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· Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

Modelled US AQI · 8 cities · CAMS via Open-Meteo

70.3Weekly mean modelled AQI · Moderate

Mean PM2.5: 18.8 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

+13.2 AQI compared with the previous week’s mean of 57.1.

Highest hourly estimate: 172 in Bangkok · .

1344 of 1344 city-hours have a modelled AQI. These are estimates for roughly 45 km model grid cells, not monitoring-station measurements. How this report is made

Daily modelled US AQI

5010061Wed64Thu68Fri71Sat72Sun76Mon80Tue
DayMean AQILow–highMean PM2.5 (µg/m³)City-hours
Wed, 18 Dec60.8Moderate38–11013.7192 / 192
Thu, 19 Dec64Moderate44–11917.9192 / 192
Fri, 20 Dec67.6Moderate45–12917.8192 / 192
Sat, 21 Dec70.6Moderate51–13318.2192 / 192
Sun, 22 Dec72.4Moderate49–12419.9192 / 192
Mon, 23 Dec76.2Moderate48–14221.8192 / 192
Tue, 24 Dec80.2Moderate53–17222.5192 / 192

Hourly means (UTC+7)

Each cell averages the selected cities’ modelled AQI for that hour.

Day01234567891011121314151617181920212223
Wed595857575857585858585858585959606471757368625958
Thu585859595960606162626363646465656671747371686667
Fri676767666767666666656565656565656774797774706666
Sat676767686868686969696969696969697278838277726968
Sun686868686868686868686869696970737884878683787372
Mon717172727373737474747474747474757986898985817575
Tue75747474747474747474747475757577869510010197928679

Cities by modelled US AQI

Sorted by weekly mean. Each city is a single model grid cell near its centre.

CityMean AQIPeak AQIMean PM2.5 (µg/m³)Hours
Chiang Mai98.4Moderate11634.9168 / 168
Bangkok91.2Moderate17226.9168 / 168
Chiang Rai70.6Moderate8420.5168 / 168
Khon Kaen69.9Moderate11419.9168 / 168
Nakhon Ratchasima62.1Moderate9314.8168 / 168
Pattaya61.1Moderate11312168 / 168
Hat Yai56.6Moderate8311.5168 / 168
Phuket52.3Moderate7410168 / 168

City-hours by category

Good: 131

Moderate: 1109

Unhealthy for Sensitive Groups: 100

Unhealthy: 4

Very Unhealthy: 0

Hazardous: 0

US AQI scale
AQICategory
0–50Good
51–100Moderate
101–150Unhealthy for Sensitive Groups
151–200Unhealthy
201–300Very Unhealthy
301+Hazardous

How this report is made

Open-Meteo provides hourly estimates from the Copernicus Atmosphere Monitoring Service (CAMS) global model at roughly 45 km resolution. We use the grid cell nearest each city’s centre. Nearby places may share a cell, and local pollution can differ.

The AQI is the provider’s modelled US AQI across pollutants, one value per city per hour. Weekly, daily and hourly means average those values across the selected cities. PM2.5 is a concentration in µg/m³. These figures use a different basis from the measured PM2.5-derived AQI in the Malaysia and Singapore reports.

Days and hours use UTC+7. The report includes past model hours only, never forecasts. The previous-week comparison appears only when at least 90% of that week’s city-hours are available.

For official local readings and advice, visit Pollution Control Department · Air4Thai. Air-quality data: Open-Meteo and CAMS, licensed under CC BY 4.0. Haze Monitor is independent of these providers and local authorities.